Auxiliary air valve for automobiles



Feb. 5, 1924.

R. o. LOUGHEED AUXILIARY AIR VALVE FOR AUTOMOBILES Filed July 51. .922

INVENTUR Patted Feb. 5, 9 24.

UNITED STATES 1,482,803 PATENT OFFICE.

HANDLE O. LOUGHEED, OF MONTPELIEB, OHIO.

" AUXILIARY AIR VALVE FOR AUTOMOBILES.

Application filed July 81, 1922. Serial No. 578,548.

To all whom it may concern:

Be it known that I, RANDLE O. LoUoHEnD, a citizen of the United States,and a resident of Montpelier, county of Williams, and State of Ohio,have made an invention ap ertainin to an Auxiliary Air Valve forutomohis; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the 'art to which it appertains to make and use the same, referencebeing had to the accompanying drawings, andto the characters ofreference marked thereon, which form a part of this specification.

My invention has for its object to provide an automatic auxiliary airintake for auto mobile engines whereby the auxiliary air will not beadmitted to the engine unless the engine has been sufiiciently heated tocause the fuel to be heated sufliciently to warrant the admission of airthrough the automatic auxiliary valve. It also provides in combinationwith the automaticcontrol, a valve having a certain weight for thepurpose of closing the valve or springs of a certain tension for thesame purpose whereby openuntil the engine is 0 ing of the valve .will beprevented, notwithstanding the temperature to which the engine may beraised by its previous operations rated at a certain speed to cause acertaln amount of suction or to produce a certain predetermined vacuouscondition in the intake manifold of the en ine.

further object of my invention is to provide a very narrow openingbetween two heated surfaces through which the auxiliary air will passupon its entrance into the engine and be heated.

The invention also has for its object other advantages and featureswhich will appear from the following description and from an examinationof the drawings.

The invention ma be contained in structures of different orms. Toillustrate a. practical application of the invention, I have selected astructure embodying the invention and shall describe it hereinafter. Thestructure selected is illustrated in the accompanyin drawings.

Fig. 1 of t e drawings is a conventional view of the intake and exhaustmanifold of an internal combustion engine commonly used in automobilesshowing the structure embodying my invention in operative relation tothe engine and the manifold. Fig.

extends from the edge of the cu trated in Fig. 2.

In Figure 1, 1 is the exhaust manifold. 2 1s the intake manifold. Themanifolds are held by means of clamps 3 in a manner well known in theart. A part of the device embodying my invention is secured in closeproximity to the exhaust manifold and to the engine head by means of twoof the clamps 3 that extend over a flange or a pair of projections 4that are formed integral with the device, and thus the, device isclamped in position in close proximity to the parts that are heated inthe operation of the engine.

The flange 4 forms a The cup 5 is closed by a flanged cover 6. Theflange 7 cated on the inside of the cup. It is of comparativelyconsiderable width and thus to well within the on The cover 6 an flange7 is formed in egral and is formed of one kind of a metal while the cup5 is formed of another kind of metal. therefore, of the two isdissimilar and the coeflicient of expansion of the metal of the cover isless than the coefficient of the metal of the cup. When, therefore, thecup and its cover is comparatively cold, that is, substantially atatmospheric temperature, the cover tightly fits the cup so as tocompletely close the end of the cup. When, however, the cup and coverare heated during the operation of the engine, the cup expands more thanthe cover expands, with the result that a very narrow opening is formedbetween the flange 7 and the edge portion of the cup as shown somewhatenlarged in Fig. 3. This narrow annular space of considerable lengthwill heat any air that'is drawn through the crack that is thus formedbetween the cover and the cup to near the temperature of the cover andthe cup.

A pipe 8 is located within the cup and passes through the bottom or endof the cup to the intake manifold of the engine, preferably at a pointwell below the arms of the intake manifold. One end of the pipe 8 isrovided with a ball valve 9 that it seated y means of a spring 10. Theball valve and the spring 10 are locateid in a thimble 11 that issecured to the en of the pi e 8 such as by press fit or by thread. he

of the cover, however, is lo- The expansivity, I

part of a cup 5. i

spring 10 has such a tensionas to hold the ball 9 seated until thesuction produced by the engine, that is, until the vacuous conditionwlthin the intake manifold is of such a degree as to cause theatmospheric pressure to force the valve open and consequently theadmission of air into the intake manifold through the pipe 8. The air,however, will not be admitted unless the temperature of the engine hasbeen raised by preceding operations of the engine sufficiently to causethe cup to be opened by the thermostatic relation between the cover andthe cup.

This insures that no auxiliary air will enter into the engine unless theconditions are such that it will be heated at least as high as apredetermined temperature.

Ordinarily the auxiliary air will be heated sufiiciently b the intimaterelation of the air with the heated parts of the device produced by theexceedingly narrow passageway formed between the flange of the cover andthe edge portion of the cup, but if it is desired to further heat theair it may be done by extending the length of that portion of the pipe 8located within the' cup. The pipe 8 may be coiled in order that it maybe contained within the cup.

I claim:

1. In an automatic auxiliary air valve for an internal combustionengine, a cup connected with the intake manifold of the en gine, a coversubstantially fitting the in terior of the cup, the cup and cover formedof material having dissimilar expansivity to close and open the cupaccording to the temperature of the cup and cover.

2. In an automatic auxiliary air valve for an internal combustionengine, a cup connected with the intake manifold of the enine, a coverhaving a flange substantially fitting the interior of the cup, the cupand cover formed of material having dissimilar expansivity to close andopen the cup accord: ing to the temperature of the cup and cover, aflange and the edge portion of the cup forming a narrow slit for causingintimate contact with the air entering the manifold through the cup toraise the temperature of the air substantially to that of the cup andcover.

3. An automatic auxiliary air valve for an internal combustion engineand having a passagewa communicating with the intake manlfo d of theengine, thermostatic aeaeoe elements for closing and opening thepassageway until the temperature of the said valve has been raised-to apredetermined degree, a spring pressed valve for maintaining thepassageway closed until the vacuous condition of the intake manifold hasreached a predetermined degree.

4:; An automatic auxiliary air valve for an internal combustion engine,comprising a pair of members having normally contacting surfaces andformed of material having dissimilar thermal expansivity, one of themembers having a passageway communicat: ing with the intake manifold ofthe engine, the members operating to close and open the passagewayaccording to the temperature of the members, a spring pressed valve formaintaining the passageway closed until the vacuous condition of theintake manifold has reached a predetermined degree.

5. In an automatic auxiliary air valve for an internal combustionengine, a cup connected with the intake manifold of the engine, a coversubstantially fitting the interior of the cup, the cup and cover formedof material having dissimilar expansivity to close and open the cupaccording to the temperature of the on and cover, a spring pressed valvefor maintaining the connection of the cup with the intake manifoldclosed until the vacuous condition of the intake manifold has reached apredetermined degree.

6. In an automatic auxiliary air valve for an internal combustionengine, a cup connected with the intake manifold of the engme, a coverhaving a flange substantially fitting the interior of the cup, the cupand cover formed of material having dissimilar expansivity to close andopen the cup according to the temperature of the cup and cover, a flangeand the edge portion of the cup forming a narrow slit for causingintimate contact with the air entering the manifold through the cup toraise the temperature of the air substantially to that of the cup andcover, a spring pressed valve for maintaining the connection of the cupwith the intake manifold closed until the vacuous condition of theintake manifold has reached a predetermined degree.

In testimony whereof I have hereunto signed my name to thisspecification.

aANnLE o. LOUGHE-ED.

